Allows patterns like "svol.2019*".
Needs @exclude_vf to be a global variable, which is ok as this only
holds command-line args (and global context for archive_exclude).
Note that adding the same in "create backups" (action run) and
macro_delete() is not a good idea, as this has weird implications on
the "forced: last" snapshot/backup pair.
Note that any action (e.g. btrfs send -p) on a subvolume with unsafe
characters will still fail with:
ERROR: Unsafe command [...] (offending string: "/tmp/btrfs_pool/svol with spaces")
Features:
- get mounted filesystems from /proc/self/mountinfo
- fetch subvolumes using "btrfs subvolume list" (fast, needs root)
- filter and print subvolumes below mount point
Add run_cmd option stream_buffer_sink, which handles stream_buffer,
rate_limit as well as --progress.
For rate limiting, run "mbuffer" (on the target host) in combination
with stream_buffer and --progress, instead of running "pv" (on the
source host).
Reasons:
- mbuffer limits the read rate: For remote targets, we want a stream
buffer in front of the rsh command pipe, before decompression.
- For local targets, this can be combined with --process.
- Combined stream_buffer and rate_limit: less commands in pipe.
Further changes:
- always set mbuffer -v1 option (never show warnings)
- restrict raw_target_block_size to "kmgKMG": compatibility to
stream_compress and rate_limit options, simplicity.
- use mbuffer blocksize option where applicable
Use $resolve_droot instead of $droot for calls to get_best_correlated
(probably missed commit), same as $resolve_sroot.
Fixes possible regression of:
514e69243a btrbk: add "incremental_resolve" configuration option
For raw targets, get_best_parent() dies as VINFO_MOUNTPOINT is not
defined on raw vinfo.
Fixes regression of:
d64e237e94 btrbk: get_best_parent: consider all parent/child relations
It's not uncommon to have a large intact parent-chain on targets
(e.g. target_preserve_min=all).
If this is the case, performance drops a bit on "btrbk archive".
Note that we could limit the search depth in get_best_parent() for
some performance improvements, as this only affects extra clones.
Perl hates recursions, and dies if recursion depth = 100:
Deep recursion on subroutine "main::_push_related_children"
Unfortunately this happens before the implemented abort condition
(distance=256).
Fixed by re-implementing get_related_readonly_nodes() non-recursive.
Refs: https://github.com/digint/btrbk/issues/279
Axel Burri